body {
    width: 100%;
    min-width: 320px;
    max-width: 640px;
    margin: 0 auto;
    font-family: -apple-system, Helvetica, sans-serif;
    font-size: 14px;
    line-height: 1.5;
}
h3{
    margin: 0;
    padding: 0;
}

a{
    color: #666;
    text-decoration: none;
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

img{
    vertical-align: top;
}

.app {
    height: 45px;
}

.app ul li {
    float: left;
    height: 45px;
    background: #333333;
    text-align: center;
    line-height: 45px;
    color: #fff;
}

.app ul li:nth-child(1) {
    width: 8%;
}

.app ul li:nth-child(1) img {
    width: 10px;
}

.app ul li:nth-child(2) {
    width: 10%;
}

.app ul li:nth-child(2) img {
    width: 30px;
    vertical-align: middle;
}

.app ul li:nth-child(3) {
    width: 57%;
}

.app ul li:nth-child(4) {
    width: 25%;
    background: #F63515;
}

/* 搜索 */
.search-wrap {
    height: 44px;
    position: fixed;
    width: 100%;
    min-width: 280px;
    max-width: 1080px;
    overflow: hidden;
}

.search-btn,
.search-login {
    width: 40px;
    height: 44px;
    position: absolute;
    top: 0;
}

.search-btn {
    left: 0;
}

.search-btn::after {
    content: "";
    display: block;
    width: 20px;
    height: 18px;
    background: url(../images/s-btn.png) no-repeat;
    background-size: 20px 18px;
    margin: 14px 0 0 15px;
}

.search-login {
    right: 0;
    color: #fff;
    margin: 10px 0;
}

.search {
    position: relative;
    height: 30px;
    border-radius: 15px;
    background: #fff;
    margin: 0 50px;
    margin-top: 7px;
}
.jd-icon {
    width: 20px;
    height: 15px;
    position: absolute;
    background: url(../images/jd-icon.png) no-repeat;
    background-size: 20px 15px;
    left: 15px;
    top: 8px;
}
.jd-icon::after{
    content: "";
    display: block;
    position: absolute;
    height: 16px;
    width: 1px;
    background: #ddd;
    top: 0;
    left: 26px;
}
.sou{
    width: 18px;
    height: 15px;
    position: absolute;
    left: 50px;
    top: 8px;
    background: url(../images/jd-sprites.png) no-repeat -80px 0;
    background-size: 200px auto;
}
/* 主体部分 */
.banner img{
    width: 100%;
}
/* 品牌 */
.brand {
    width: 100%;
    overflow: hidden;
    border-radius: 10px 10px 0 0;
}
.brand div{
    float: left;
    width: 33.33%;
}
.brand div img {
    width: 100%;
}
/* nav */
nav {
    overflow: hidden;
}
nav a {
    width: 20%;
    float: left;
    text-align: center;
}
nav a img {
    width: 40px;
    margin: 10px 0;
}
nav a span {
    display: block;
    font-size: 12px;
    margin: -5px 0 0;
}
.floor{
    width: 100%;
    margin-top: 10px;
    margin-bottom: 20px;
}
.floor-container {
    box-sizing: border-box;
    overflow: hidden;
    width: 92%;
    margin: 0 auto;
    background: #fff;
}
.item{
    box-sizing: border-box;
    width: 25%;
    float: left;
    padding: 6px 0 5px 10px;
    text-align: center;
}
 .text{
    width: 100%;
    padding: 0;
    overflow: hidden;

}
.text p{
    position: relative;
    font-size: 12px;
    left: -6px;
    margin: 0;
    color: #222;
}
.text h3{
    font-size: 16px;
    color: rgb(34,34,34);
    position: relative;
    left: 0;
    
}
.img{
    box-sizing: border-box;
    width: 100%;
    margin-bottom: -5px;
}
.img img{
    width: 100%;
}

.floor-top{
    width: 100%;
    height: 34px;
}
.floor-main{
    width: 100%;
    height: 218px;
}
.floor-top .floor-top-item:nth-child(1) {
    width: 60%;
    float: left;
}
.floor-top .floor-top-item:nth-child(2){
    width: 40%;
    float: right;
}